Track fob tractobs



W. J. SANDERSON.

TRACK FOR TRACTORS. APPLICATION FILED APR. 11. 1918- 1306282. Patented June 10, 1919.

I' TH um I. w" W M I IN V EN T OR. Milwr I] Smdmsan BY g A TTORNEY.

wILBEn. J. snivionnson, or sAii LEANDRo, CALIFORNIA.

' TRACK ron TRACTORS.

b Specification of Letters Patent.

Patented June 10, 1919.

Application filed April 11, 1918. Serial No. 227,835.

To all whom z't mag/concern: 1

v Be it known that I, IVILBER J. SANDER- soN, a citizen of the United States, residing at San Leandro, in thercounty of Alameda and State of California, have invented certain new'and useful Improvements in Tracks for Tractors; and I do declare the following to be a clear, full, and exact description of the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in. traction engines and particularly to the link construction of the endless tracks used on certain types of tractors.

The object of the invention is to so construct the links of the track as to provide all of the advantages desired with the elimi' nation of the many disadvantages encountered in the construction of those tracks now commonly in use.

I first aim to provide a means for .allowing a quick, simple and efficient assembly of the links with a means provided whereby the connecting pins may be reversed when worn and also providing a means for preventing the sleeves on the pins from having independent rotary motion whereby they would be subjected to excessive wear.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purposes for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of the parts as will fully appear by a perusal of the following specification and claims.

On the drawings, similar characters of reference indicate corresponding parts in the several views.

Figure 1 is a side elevation of one of the complete links.

Fig. 2 is a top plan view of the same.

Fig. 3 is a fragmentary view of one end of the connecting pin with the bosses and link ends shown thereon in section.

Referring now more particularly to the characters of reference on the drawings, the track sections consist of links arranged in pairs, each link of each pair comprising a main body portion 1 terminating at one end in a boss 2 having a projecting annular side flange 3. At the opposite end, the body 1 is provided with another boss 4, which boss 4: is provided with a pair of inwardly proother.

jecting spaced lugs 5 fora purpose as will presently appear. The bosses 2 and I are each rabbeted out, as at 2 and 4 to permit the corresponding bosses on theadjacent links to be overlapped to form a continuous topsurface to the links to receive and support the rollers on the auxiliary trucks of the tractor.

The connecting pins 6 for the links have squared ends 7 which fit into corresponding square. orifices 8 formed inthe bosses 2 and flanges 8. This prevents independent rotary motion of thepins 6, the only motion of such pins 6 being that occasioned by. the flexing of the links with respect to each The sleeves 9- are mounted around the pins 6 and project into bosses l. Such sleeves 9 are provided with end lugs 9" which fit between the lugs 5 so as to prevent such sleeves from having any independent rotary motion on the pins 6, but such sleeves are only allowed that motion which is imparted to them by the flexing of the links with respect to each other. \Vhen assembled, the squared ends 7 of the pins 6 project beyond the ends of the bosses 2 and are secured in position by means of cotter pins 10.

By reason of the structure of the pins 6 having the squared ends 7, these pins may be taken out and reversed completely or turned a quarter of a turn at a time and thus the point of wear may be altered so as to extend the life of the pin. Similarly, the sleeves 9 my be taken out and their position reversed so as to change the point of wear and if desired, such sleeves may be provided with the lugs 9 at spaced intervals so that the position of the said sleeves may be altered in quarter turns, thus likewise extending the useful life of such sleeves.

The pin and sleeve construction noted affords a very simple means of assembling the track links and at the same time the two essential features of preventing the pins, and likewise the sleeves, from having independent rotary motion are accomplished. If such pins and sleeves had independent rotary motion, they would quickly wear out, which of course would be a very objectionable feature.

I provide the flanges 3 so as to give a greater supporting and bearing surface to the links. By this means, I aim, if possible, to have an amount of bearing for the links equal to the bearing of the sleeves on the pins between the links. Thus, the carrying of the load and the relative frictional Wear between all the parts Will be equalized.

From the foregoing description it will readily be seen that I have produced such a device as substantially fulfils the objects of the invention as set forth herein.

While this specification sets'forth in detail the present and preferred construction ref-the device, still in practice, suehy cle'v-ia- 'tions from such detail may be resorted to as do not for-ma departure 'fromthe spirit of theinvention, as defined bythe appended 1 claims.

links of each pair having'overlappi'ngbosses,

the outerniost bosses "havi'n'g square holes and the innermost -round holes,"sleeves proectmg i'ntothe round holed bosses, and pins in presence ofatwowitnesses.

whose ends are square projecting through the sleeves and seated in the square holed bosses, whereby the position of the pins relativeto the bosses may be altered by quarterturns 'to change the Wearing surface thereof.

2. A track for tractors comprising links arrangedin pairs, the adjacent ends of the links ;-of each pair having overlapping bosses, the outermost bosses having square holes, pins having squar'edce'nds projecting into the square holed bosses,'sleeves on the .pins: projecting into theround holed bosses, and 'means for-holding thesleeves aga nst independent rotation relat1-ve to 'the :*last named *bosses,';such means-including spaced lugs 'on-the boss'es andxlugs on the sleeves -p'rojecti'ngbettveen such spaced lugs.

Intesti-mony whereof I affix my signature *WILBER J. SANDER-SON. WVitness'es': 1 V VIVIAN Morris, V BERNARD PRI'VAT. I

Copies of thisrpatent'may benbt'ained for fivee'ents each, by addressingahe Commissioner 'of Pat ents, H

'W ashington, D. '6. 

